That X-Men intro is weird... I don't think the Brood ever got that much screentime before! Totally awesome though, that first one makes a lot of sense when you consider X-Men: Children of the Atom.
As for Batman, that's a nice song. Catchy.

Did they just not know what Magneto's power was, or something? I see him shooting laser beams, summoning demons and having a fireball battle with Professor X. None of those things are at all made of metal.

Half of the second X-Men intro was actually used in an older X-Men arcade game that came out in the early 90's. The game actually had Magneto unleashing an army of the Brood and Sentinels against the world.